EP1675157B1 - Vessel for discharge lamp - Google Patents
Vessel for discharge lamp Download PDFInfo
- Publication number
- EP1675157B1 EP1675157B1 EP05027022A EP05027022A EP1675157B1 EP 1675157 B1 EP1675157 B1 EP 1675157B1 EP 05027022 A EP05027022 A EP 05027022A EP 05027022 A EP05027022 A EP 05027022A EP 1675157 B1 EP1675157 B1 EP 1675157B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- bulb
- central region
- discharge lamp
- outer contour
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 49
- 230000003287 optical effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/84—Lamps with discharge constricted by high pressure
- H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
Definitions
- the present invention relates to a piston for discharge lamps, in particular for short-arc discharge lamps, according to claim 1.
- Discharge lamps are used today in many fields, for example as projection light sources.
- a discharge lamp always comprises a piston or burner, for example made of quartz glass, which has a gas space filled with gas.
- the so-called barrel which is filled for example with xenon, other noble gases or metal vapors, such as mercury, two opposing electrodes are included, between which the discharge takes place.
- both the outer contour of the piston and the barrel have a central region which is designed in the form of a circular barrel. That is, the sectional figure of one of these middle Areas having any plane containing the piston axis is a circular segment of radius r whose center is at a distance R from the piston axis. In previous piston designs, the center of this circle segment is between this and the piston axis (R> 0).
- the center points of the circle segments belonging to the middle regions of the outer contour of the piston and the barrel lie in the same normal plane to the piston axis, so that both circles are concentric.
- central regions are mirror-symmetric with respect to this normal plane continuously into edge regions which are frustoconical in the barrel, tubular in the outer contour. Between the middle and the tubular portion of the outer contour, a constriction with predetermined radii is present.
- both the outer contour and the shape of the barrel is always not only rotationally symmetrical to the piston axis, but also mirror-symmetrical to the normal plane.
- the optical efficiency i. the ratio of absorbed current to emitted light, but not yet optimal.
- the US Pat. No. 6,246,170 B1 shows a piston for a discharge lamp, in which the centers of the circular segments, which form the outer contour of the piston and the combustion chamber, in the direction of the piston axis at a distance from each other in order to increase the optical efficiency of the lamp, in particular in combination with a reflector.
- the invention has for its object to provide a piston for discharge lamps with a higher optical efficiency available.
- a piston for a discharge lamp according to claim 1 comprises in known manner an inner combustion chamber, wherein the outer contour of the piston and the combustion chamber each have a central region and adjoining edge regions, each central region is formed like a circular barrel.
- a piston for a discharge lamp according to claim 1 comprises in known manner an inner combustion chamber, wherein the outer contour of the piston and the combustion chamber each have a central region and adjoining edge regions, each central region is formed like a circular barrel and wherein each edge region of the combustion chamber frusto-conical away from the central region is formed rotationally symmetrical to the piston axis with a certain cone angle.
- these cone angles of the two edge regions of the combustion chamber are unequal in size.
- the cone angle of one of the two edge regions of the combustion chamber in the range between 22 ° and 60 °, particularly preferably between 30 ° and 45 °, the cone angle of the other edge region in the range between 0 ° and 30 °, preferably between 10 ° and 20 °.
- cone angles of 0 ° are possible, so that instead of a tapered truncated cone, a tubular edge region is present.
- the length of each edge region may be suitably chosen, for example so that the total length of the combustion chamber remains unchanged compared with a conventional one.
- the discharge lamp with a piston according to the invention has a reflector
- the reflector-side edge region of the combustion chamber has the larger, the other edge region the smaller cone angle.
- the circular segment which forms the central region of the outer contour and / or of the combustion chamber, is advantageously displaced toward the piston axis in such a way that the combustion chamber and / or the wall thickness of the piston in the middle region is equal to that of pistons according to the prior art. In this way it is possible to retain existing production tools and processes and to use empirically determined optima for these values.
- FIG. 1 schematically a discharge lamp 1 is shown with a piston 2 according to the invention.
- An elliptical reflector 5 is arranged around this, concentrating the light generated by the burner in the secondary focal plane.
- the piston 2 has an outer contour with a central region 2a, which is formed Vietnamese wageronnenförmoge. This shows FIG. 2 the corresponding Parameters.
- the center of the circle segment formed by a section of the outer contour with any plane containing the piston axis (radius r B ) has a distance R B to the piston axis, which can be positive or negative.
- the outer contour can be thought to have been created by moving a segment of a circle having a radius r B whose center lies on the piston axis normal to this piston axis by a radius of rotation R B. Is doing the circular segment, as in FIG. 2 , displaced away from the piston axis in the direction of the circle segment, the turning radius is positive (R B > 0), negative in displacement on the piston axis in the opposite direction (R B ⁇ 0). Subsequently, the circular segment rotates about the piston axis and thereby passes over the central region 2a of the outer contour.
- An edge region 2b adjoins this middle region on both sides, which in turn adjoins a shank region 2c and is constricted relative thereto.
- the geometric shape of the shaft portion of the piston is not essential to the present invention and may correspond to those of the prior art pistons.
- the piston has a combustion chamber 3 filled with gas or metal vapor, in which electrodes 4 are arranged.
- the connection of the electrodes is not shown for the sake of clarity in the schematic figures.
- the combustion chamber has a circular sun-shaped central region 3a, whose characteristics FIG. 2 shows. As in FIG. 2 shown, the center of the corresponding circle segment is shifted beyond the piston axis.
- the combustion chamber can be thought to have been created by moving the center point of a circle segment with radius r T away from the piston axis normal to this piston axis by a turning radius R T.
- the piston axis lies between the circle segment and its center, ie the turning radius is negative (R T ⁇ 0). Equivalent to this is the turning radius negative if and only if the maximum distance from the Piston axis to the swept surface is smaller than the segment radius.
- the circle segment rotates about the piston axis and thereby passes over the central region 3a of the combustion chamber.
- a truncated cone-shaped edge region 3b adjoins this middle region on both sides, tapering outward from the middle region 3a in a rotationally symmetrical manner to the piston axis with a specific cone angle ⁇ 1 or ⁇ 2 ( FIG. 3 ). At the end of the combustion chamber is sealed.
- the cone angles ⁇ 1 and ⁇ 2 of the two edge regions of the combustion chamber are unequal in size.
- the area facing the reflector 5 is significantly steeper than usual in the prior art, the opposite area significantly flatter.
- FIG. 4 shows by way of example a piston according to a second embodiment of the present invention.
- the middle region 3a of the combustion chamber indicated by the dashed circle whose segment sweeps over the circular-sun-shaped region, is displaced from the central contour 2a of the outer contour by a distance z in the direction of the piston axis.
- the central region of the combustion chamber is displaced in the direction of the reflector 5.
- the center of the center circle of the outer contour preferably remains in the first focal point of the reflector 5.
- negative radii refer to a displacement of the circle segment beyond the piston axis.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Kolben für Entladungslampen, insbesondere für Kurzbogen- Entladungslampen, gemäß Patentanspruch 1.The present invention relates to a piston for discharge lamps, in particular for short-arc discharge lamps, according to claim 1.
Entladungslampen werden heute in vielen Bereichen eingesetzt, beispielsweise als Projektionslichtquellen.Discharge lamps are used today in many fields, for example as projection light sources.
Dabei umfasst eine Entladungslampe stets einen Kolben oder Brenner, beispielsweise aus Quarzglas, der einen mit Gas gefüllten Brennraum aufweist. In diesen Brennraum, die so genannte Tonne, die beispielsweise mit Xenon, anderen Edelgase oder Metalldämpfen, beispielsweise Quecksilber gefüllt ist, sind zwei einander gegenüberliegende Elektroden eingeschlossen, zwischen denen die Entladung stattfindet.In this case, a discharge lamp always comprises a piston or burner, for example made of quartz glass, which has a gas space filled with gas. In this combustion chamber, the so-called barrel, which is filled for example with xenon, other noble gases or metal vapors, such as mercury, two opposing electrodes are included, between which the discharge takes place.
Die geometrische Form bekannter Kolben ist historisch entstanden und empirisch optimiert. Insbesondere aus Gründen der Herstellung sind sowohl die Außenkontur des Kolbens als auch die Form der Tonne stets rotationssymmetrisch zur Kolbenachse.The geometric shape of known pistons has historically arisen and has been empirically optimized. In particular, for reasons of production, both the outer contour of the piston and the shape of the barrel are always rotationally symmetrical to the piston axis.
Bei Kolben nach dem Stand der Technik weisen sowohl die Außenkontur des Kolbens als auch der Tonne einen mittleren Bereich auf, der kreistonnenförmig ausgebildet ist. Das heißt, dass die Schnittfigur eines dieser mittleren Bereiche mit einer beliebigen, die Kolbenachse enthaltenden Ebene ein Kreissegment mit dem Radius r ist, dessen Mittelpunkt einen Abstand R zur Kolbenachse aufweist. Bei bisherigen Kolbendesigns liegt der Mittelpunkt dieses Kreissegments zwischen diesem und der Kolbenachse (R>0).In the case of pistons according to the prior art, both the outer contour of the piston and the barrel have a central region which is designed in the form of a circular barrel. That is, the sectional figure of one of these middle Areas having any plane containing the piston axis is a circular segment of radius r whose center is at a distance R from the piston axis. In previous piston designs, the center of this circle segment is between this and the piston axis (R> 0).
Die Mittelpunkte der zu den mittleren Bereichen der Außenkontur des Kolbens und der Tonne gehörenden Kreissegmente liegen dabei in der selben Normalebene zur Kolbenachse, so dass beide kreistonnen konzentrisch sind.The center points of the circle segments belonging to the middle regions of the outer contour of the piston and the barrel lie in the same normal plane to the piston axis, so that both circles are concentric.
Diese mittleren Bereiche gehen spiegelsymmetrisch bezüglich dieser Normalebene kontinuierlich in Randbereiche über, die bei der Tonne kegelstumpfförmig, bei der Außenkontur rohrförmig sind. Zwischen dem mittleren und dem rohrförmigen Bereich der Außenkontur ist eine Einschnürung mit vorgegebenen Radien vorhanden.These central regions are mirror-symmetric with respect to this normal plane continuously into edge regions which are frustoconical in the barrel, tubular in the outer contour. Between the middle and the tubular portion of the outer contour, a constriction with predetermined radii is present.
Bei bekannten Kolben ist daher sowohl die Außenkontur als auch die Form der Tonne stets nicht nur rotationssymmetrisch zur Kolbenachse, sondern auch spiegelsymmetrisch zu der Normalebene.In known pistons, therefore, both the outer contour and the shape of the barrel is always not only rotationally symmetrical to the piston axis, but also mirror-symmetrical to the normal plane.
Diese Symmetrien sind insbesondere bei der Herstellung der Kolben aus Glas, insbesondere Quarzglas vorteilhaft und bewirken auch eine hohe mechanische Festigkeit gegenüber dem Gasdruck in der Tonne.These symmetries are particularly advantageous in the production of the flask made of glass, in particular quartz glass and also cause a high mechanical strength against the gas pressure in the barrel.
Bei bekannten Kolben mit oben beschriebener geometrischer Form ist die optische Effizient, i.e. das Verhältnis von aufgenommenem Strom zu abgegebenem Licht, jedoch noch nicht optimal.In known pistons having the geometrical shape described above, the optical efficiency, i. the ratio of absorbed current to emitted light, but not yet optimal.
Das
Der Erfindung liegt die Aufgabe zugrunde, einen Kolben für Entladungslampen mit einer höheren optischen Effizienz zur Verfügung zu stellen.The invention has for its object to provide a piston for discharge lamps with a higher optical efficiency available.
Zur Lösung dieser Aufgabe ist ein Kolben gemäß dem Oberbegriff des Anspruchs 1 durch dessen kennzeichnenden Merkmale weitergebildet. Besonders vorteilhafte Ausführungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.To solve this problem is a piston according to the preamble of claim 1 by its characterizing features further training. Particularly advantageous embodiments of the invention are described in the dependent claims.
Ein Kolben für eine Entladungslampe gemäß Anspruch 1 umfasst in an sich bekannter Weise einen inneren Brennraum, wobei die Außenkontur des Kolbens und des Brennraums je einen mittleren Bereich und daran anschließende Randbereiche aufweisen, wobei jeder mittlere Bereich kreistonnenförmig ausgebildet ist.A piston for a discharge lamp according to claim 1 comprises in known manner an inner combustion chamber, wherein the outer contour of the piston and the combustion chamber each have a central region and adjoining edge regions, each central region is formed like a circular barrel.
Das heißt, dass er durch Verschiebung eines Kreissegments, das einen Segmentradius aufweist und dessen Mittelpunkt auf der Kolbenachse liegt, normal zur dieser Kolbenachse um einen Drehradius und Rotation des Kreissegments um diese Kolbenachse entsteht.That is, by shifting a circular segment having a segment radius centered on the piston axis normal to this piston axis by a rotational radius and rotation of the circle segment about that piston axis.
Ein Kolben für eine Entladungslampe gemäß Anspruch 1 umfasst in an sich bekannter Weise einen inneren Brennraum, wobei die Außenkontur des Kolbens und des Brennraums je einen mittleren Bereich und daran anschließende Randbereiche aufweisen, wobei jeder mittlere Bereich kreistonnenförmig ausgebildet ist und wobei jeder Randbereich des Brennraums kegelstumpfförmig von dem mittleren Bereich weg rotationssymmetrisch zur Kolbenachse mit einem bestimmten Kegelwinkel ausgebildet ist.A piston for a discharge lamp according to claim 1 comprises in known manner an inner combustion chamber, wherein the outer contour of the piston and the combustion chamber each have a central region and adjoining edge regions, each central region is formed like a circular barrel and wherein each edge region of the combustion chamber frusto-conical away from the central region is formed rotationally symmetrical to the piston axis with a certain cone angle.
Bei einem erfindungsgemäßen Kolben sind diese Kegelwinkel der beiden Randbereiche des Brennraums ungleich groß.In a piston according to the invention, these cone angles of the two edge regions of the combustion chamber are unequal in size.
Zusätzlich kann ein Kolben nach Anspruch 1 auch eines oder eine Kombination der nachfolgenden Merkmale aufweisen:
- die Mittelpunkte der Kreissegmente, die den mittleren Bereich der Außenkontur und des Brennraums bilden, weisen in Richtung der Kolbenachse einen Abstand auf; und/oder
- die Kolbenachse liegt zwischen dem Kreissegment, welches den mittleren Bereich der Außenkontur und/oder des Brennraums bildet und dessen Mittelpunkt.
- the centers of the circle segments, which form the central region of the outer contour and the combustion chamber, have a spacing in the direction of the piston axis; and or
- the piston axis lies between the circle segment, which forms the central region of the outer contour and / or the combustion chamber and its center.
Durch die oben beschriebenen Veränderungen der geometrischen Form des mittleren Bereichs der Außenkontur und/oder des Brennraums und der Randbereiche des Brennraums gemäß Anspruch 1 hat sich überraschenderweise eine deutlich höhere Nutzlichtausbeute erfindungsgemäßer Kolben ergeben. Die Nutzlichtausbeute konnte gegenüber herkömmlichen Brennern um bis zu 20% gesteigert werden. Durch geeignete Wahl der oben genannten Parameter Abstand der Mittelpunkte der Kreissegmente in Richtung der Kolbenachse, Differenz der Kegelwinkel und Verschiebung eines oder beider Kreissegmente hin zur Kolbenachse kann der Kolben bei einem gegebenen Reflektor bezüglich des Lichtstroms durch eine bestimmte Blende optimiert werden.By the above-described changes in the geometric shape of the central region of the outer contour and / or the combustion chamber and the edge regions of the combustion chamber according to claim 1 has surprisingly resulted in a significantly higher Nutzlichtausbeute inventive piston. The useful light yield could be increased by up to 20% compared to conventional burners. By suitable choice of the above parameters distance of the centers of the circle segments in the direction of the piston axis, difference of the cone angle and displacement of one or both circular segments towards the piston axis, the piston can be optimized for a given reflector with respect to the luminous flux through a specific aperture.
Bevorzugt liegt der Kegelwinkel eines der beiden Randbereiche des Brennraums im Bereich zwischen 22° und 60°, besonders bevorzugt zwischen 30° und 45°, der Kegelwinkel des anderen Randbereichs im Bereich zwischen 0° und 30°, bevorzugt zwischen 10° und 20°. Insbesondere sind auch Kegelwinkel von 0° möglich, so dass an Stelle eines sich verjüngenden Kegelstumpfes ein rohrförmiger Randbereich vorhanden ist. Die Länge jedes Randbereichs kann geeignet gewählt sein, beispielsweise so, dass die Gesamtlänge des Brennraums unverändert gegenüber einer herkömmlichen Tonne bleibt.Preferably, the cone angle of one of the two edge regions of the combustion chamber in the range between 22 ° and 60 °, particularly preferably between 30 ° and 45 °, the cone angle of the other edge region in the range between 0 ° and 30 °, preferably between 10 ° and 20 °. In particular, cone angles of 0 ° are possible, so that instead of a tapered truncated cone, a tubular edge region is present. The length of each edge region may be suitably chosen, for example so that the total length of the combustion chamber remains unchanged compared with a conventional one.
Sofern die Entladungslampe mit einem erfindungsgemäßen Kolben einen Reflektor aufweist, ist der Mittelpunkt des Kreissegments, das den mittleren Bereich der Außenkontur oder des Brennraums bildet, vorteilhafterweise in Richtung der Kolbenachse verschoben, während der andere Mittelpunkt in der Ebene des ersten Brennpunkts des Reflektors angeordnet ist. Gleichermaßen ist es bevorzugt, dass der reflektorseitige Randbereich des Brennraums den größeren, der andere Randbereich den kleineren Kegelwinkel aufweist.If the discharge lamp with a piston according to the invention has a reflector, the center of the circle segment, which forms the central region of the outer contour or the combustion chamber, advantageously displaced in the direction of the piston axis, while the other center in the plane of the first focus of the reflector is arranged. Similarly, it is preferred that the reflector-side edge region of the combustion chamber has the larger, the other edge region the smaller cone angle.
Vorteilhaft ist das Kreissegment, welches den mittleren Bereich der Außenkontur und/oder des Brennraums bildet, zur Kolbenachse hin derart verschoben, dass der Brennraum und/oder die Wandstärke des Kolbens im mittleren Bereich gleich derjenigen von Kolben nach dem Stand der Technik ist. Damit können zum Teil vorhandene Fertigungswerkzeuge und - verfahren beibehalten und empirisch ermittelte Optima für diese Werte benutzt werden.The circular segment, which forms the central region of the outer contour and / or of the combustion chamber, is advantageously displaced toward the piston axis in such a way that the combustion chamber and / or the wall thickness of the piston in the middle region is equal to that of pistons according to the prior art. In this way it is possible to retain existing production tools and processes and to use empirically determined optima for these values.
Nachstehend wird die Erfindung anhand bevorzugter Ausführungsbeispiele näher erläutert. Es zeigen:
-
Figur 1 eine schematische Darstellung einer Entladungslampe nach einer ersten Ausführung der vorliegenden Erfindung; -
den Kolben nachFigur 2Figur 1 mit Kenngrößen des mittleren Bereichs; -
den Kolben nachFigur 3Figur 1 mit Kenngrößen des Randbereichs; und -
einen Kolben nach einer zweiten Ausführung der vorliegenden Erfindung.Figur 4
-
FIG. 1 a schematic representation of a discharge lamp according to a first embodiment of the present invention; -
FIG. 2 after the pistonFIG. 1 with parameters of the middle range; -
FIG. 3 after the pistonFIG. 1 with parameters of the edge area; and -
FIG. 4 a piston according to a second embodiment of the present invention.
In
Der Kolben 2 weist eine Außenkontur mit einem mittleren Bereich 2a auf, der kreistonnenförmoge ausgebildet ist. Hierzu zeigt
Die Außenkontur kann dadurch entstanden gedacht werden, dass ein Segment eines Kreises, der einen Radius rB aufweist und dessen Mittelpunkt auf der Kolbenachse liegt, normal zu dieser Kolbenachse um einen Drehradius RB verschoben wird. Wird dabei das Kreissegment, wie in
An diesen mittleren Bereich schließt sich beidseitig ein Randbereich 2b an, der sich seinerseits an einen Schaftbereich 2c anschließt und gegenüber diesem eingeschnürt ist. Die geometrische Form des Schaftbereichs des Kolbens ist für die vorliegende Erfindung nicht wesentlich und kann derjenigen Kolben nach dem Stand der Technik entsprechen.An
Der Kolben weist einen mit Gas oder Metalldampf gefüllten Brennraum 3 auf, in dem Elektroden 4 angeordnet sind. Der Anschluss der Elektroden ist der besseren Übersichtlichkeit halber in den schematischen Figuren nicht dargestellt.The piston has a
Auch der Brennraum weist einen kreistonnenförmigen mittleren Bereich 3a auf, dessen Kenngrößen
Der Brennraum kann dadurch entstanden gedacht werden, dass der Mittelpunkt eines Kreissegments mit Radius rT von der Kolbenachse weg normal zu dieser Kolbenachse um einen Drehradius RT verschoben wird. In
An diesen mittleren Bereich schließt sich beidseitig ein kegelstumpfförmiger Randbereich 3b an, der sich von dem mittleren Bereich 3a nach außen rotationssymmetrisch zur Kolbenachse mit einem bestimmten Kegelwinkel α1 bzw. α 2 verjüngt (
Die Kegelwinkel α1 bzw. α2 der beiden Randbereiche des Brennraums sind dabei ungleich groß. Der dem Reflektor 5 zugewandte Bereich ist deutlich steiler als nach dem Stand der Technik üblich, der abgewandte Bereich deutlich flacher.The cone angles α 1 and α 2 of the two edge regions of the combustion chamber are unequal in size. The area facing the
Mit anderen Worten weisen die Mittelpunkte der Segmente der (in
Tabelle 1 zeigt exemplarisch Segment- (r) und Drehradien (R) von Außenkontur (rB, RB) und Brennraum (rT, RT), die Kegelwinkel α1 bzw. α2, den Abstand z der Mittelpunkte der Kreissegmente in Richtung der Kolbenachse sowie die gegenüber exemplarisch in der ersten Zeile spezifizierten Standardkolben nach dem Stand der Technik ("SdT") erreichte Erhöhung Δ des Nutzlichtstromes durch eine Blende von 5,0x3,8 mm2 in der sekundären Brennebene eines elliptischen Reflektors der numerischen Exzentrizität e=0,774. Wie erläutert bezeichnen negative Radien eine Verschiebung des Kreissegments über die Kolbenachse hinaus.
Die Beispiele 3 und 4 mit RT=0 fallen dabei nicht in den beanspruchten Schutzbereich.Examples 3 and 4 with R T = 0 do not fall within the claimed scope.
Durch geeignete Wahl der verschiedenen Parameter, insbesondere aber durch Aufgabe der Symmetrie bezüglich der Normalebene zur Kolbenachse des Brenners, ist es also erfindungsgemäß möglich, den Kolben besser an die optische Charakteristik eines Reflektor anzupassen. Gleichwohl bleibt die für die Herstellung und die optische Charakteristik wichtige Rotationssymmetrie bezüglich der Kolbenachse erhalten. Ebenso können viele für den Lampenbetrieb wichtige und bewährte Parameter, beispielsweise die Wandstärke des Kolbens, das Volumen des Brennraums, unverändert gegenüber dem Stand der Technik bleiben.By suitable choice of the various parameters, but in particular by abandoning the symmetry with respect to the normal plane to the piston axis of the burner, it is thus possible according to the invention to better adapt the piston to the optical characteristics of a reflector. Nevertheless, the important for the production and the optical characteristic rotational symmetry with respect to the piston axis is maintained. Likewise, many parameters which are important and proven for lamp operation, for example the wall thickness of the piston, the volume of the combustion chamber, can remain unchanged compared to the prior art.
- 11
- Entladungslampedischarge lamp
- 22
- Kolbenpiston
- 2a2a
- mittlerer Bereich des Kolbensmiddle area of the piston
- 2b2 B
- Randbereich des KolbensEdge area of the piston
- 2c2c
- Schaftbereichshaft area
- 33
- Brennraum ("Tonne")Combustion chamber ("ton")
- 3a3a
- mittlerer Bereich des Brennraumsmiddle area of the combustion chamber
- 3b3b
- Randbereich des BrennraumsEdge area of the combustion chamber
- 44
- Elektrodenelectrodes
- 55
- Reflektorreflector
- RT R T
- Drehradius des Brennraums ("Tonne")Turning radius of the combustion chamber ("ton")
- rT r T
- Segmentradius des BrennraumsSegment radius of the combustion chamber
- RB R B
- Drehradius des Kolbens ("Brenners")Turning radius of the piston ("burner")
- rB r B
- Segmentradius des KolbensSegment radius of the piston
Claims (9)
- Bulb (2) for a discharge lamp, which comprises an inner combustion chamber (3), the outer contour of the bulb and the combustion chamber each having a central region (2a, 3a) and adjacent edge regions (2b, 3b), each central region being in the form of a circular drum such that the section through the central region with any desired plane containing the bulb axis comprises a circle segment which has a segment radius (r) and whose midpoint is spaced apart from this bulb axis by a rotation radius (R), characterized in that each edge region of the combustion chamber being in the form of a truncated cone away from the central region (3a) and rotationally symmetrically with respect to the bulb axis, at a specific angle of taper (α), the angles of taper (α1, α2) of the two edge regions of the combustion chamber not being the same.
- Bulb (2) for a discharge lamp according to Claim 1, characterized in that the midpoints of the circle segments, which form the central region of the outer contour and of the combustion chamber, have a distance (z) in the direction of the bulb axis; and/or the bulb axis lies between the midpoint of the circle segment, which forms the central region of the outer contour and/or of the combustion chamber, and this circle segment (R < 0).
- Bulb for a discharge lamp according to Claim 2, characterized in that the midpoints of the circle segments, which form the central region of the outer contour and of the combustion chamber, have a distance (z) in the range of greater than 0 to 1 mm in the direction of the bulb axis.
- Bulb for a discharge lamp according to either of Claims 1 and 2, characterized in that the angle of taper (α1) of a first of the two edge regions (3a) of the combustion chamber is in the range between 22° and 60°, preferably between 30° and 45°.
- Bulb for a discharge lamp according to one of Claims 1, 2 and 4, characterized in that the angle of taper (α2) of a second of the two edge regions (3a) of the combustion chamber is in the range between 0° and 30°, preferably between 10° and 20°.
- Bulb for a discharge lamp according to either of Claims 4 and 5, characterized in that the first of the edge regions faces a reflector (5).
- Bulb for a discharge lamp according to one of the preceding claims, characterized in that the circle segment of the central region of the combustion chamber has a radius of 2.2 to 4 mm.
- Bulb for a discharge lamp according to one of the preceding claims, characterized in that the circle segment of the outer contour has a radius of 6 to 8 mm.
- Bulb for a discharge lamp according to one of the preceding claims, characterized in that the circle segment, which forms the central region of the outer contour and/or of the combustion chamber, is displaced towards the bulb axis such that the wall thickness of the bulb is 1.5 to 3 mm in the central region.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004062265A DE102004062265A1 (en) | 2004-12-23 | 2004-12-23 | Piston for discharge lamps |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1675157A2 EP1675157A2 (en) | 2006-06-28 |
EP1675157A3 EP1675157A3 (en) | 2007-06-06 |
EP1675157B1 true EP1675157B1 (en) | 2010-02-24 |
Family
ID=35851973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05027022A Not-in-force EP1675157B1 (en) | 2004-12-23 | 2005-12-09 | Vessel for discharge lamp |
Country Status (8)
Country | Link |
---|---|
US (1) | US7545099B2 (en) |
EP (1) | EP1675157B1 (en) |
JP (1) | JP2006179489A (en) |
CN (1) | CN1828821B (en) |
AT (1) | ATE459093T1 (en) |
CA (1) | CA2531085A1 (en) |
DE (2) | DE102004062265A1 (en) |
TW (1) | TW200636796A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009060399A1 (en) * | 2007-11-06 | 2009-05-14 | Koninklijke Philips Electronics N.V. | Illumination system, high-pressure discharge lamp and image projection system |
JP5272983B2 (en) * | 2009-09-11 | 2013-08-28 | ウシオ電機株式会社 | Light source device |
US9552976B2 (en) | 2013-05-10 | 2017-01-24 | General Electric Company | Optimized HID arc tube geometry |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2856955B2 (en) * | 1991-08-06 | 1999-02-10 | ウシオ電機株式会社 | Short arc type metal halide lamp light source device |
JPH11238488A (en) * | 1997-06-06 | 1999-08-31 | Toshiba Lighting & Technology Corp | Metal halide discharge lamp, metal halide discharge lamp lighting device and lighting system |
JPH10340704A (en) * | 1997-06-06 | 1998-12-22 | Stanley Electric Co Ltd | Discharge lamp for automobile |
JP3847927B2 (en) * | 1997-11-18 | 2006-11-22 | キヤノン株式会社 | Arc tube and light source device using the same |
JP3531539B2 (en) * | 1999-06-08 | 2004-05-31 | ウシオ電機株式会社 | Light source device |
DE10151267A1 (en) * | 2001-10-17 | 2003-04-30 | Philips Corp Intellectual Pty | lighting unit |
-
2004
- 2004-12-23 DE DE102004062265A patent/DE102004062265A1/en not_active Withdrawn
-
2005
- 2005-12-09 AT AT05027022T patent/ATE459093T1/en not_active IP Right Cessation
- 2005-12-09 DE DE502005009080T patent/DE502005009080D1/en active Active
- 2005-12-09 EP EP05027022A patent/EP1675157B1/en not_active Not-in-force
- 2005-12-20 CA CA002531085A patent/CA2531085A1/en not_active Abandoned
- 2005-12-20 JP JP2005366951A patent/JP2006179489A/en active Pending
- 2005-12-21 TW TW094145516A patent/TW200636796A/en unknown
- 2005-12-22 US US11/313,845 patent/US7545099B2/en not_active Expired - Fee Related
- 2005-12-23 CN CN200510121760.9A patent/CN1828821B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
TW200636796A (en) | 2006-10-16 |
CA2531085A1 (en) | 2006-06-23 |
DE502005009080D1 (en) | 2010-04-08 |
DE102004062265A1 (en) | 2006-07-13 |
US7545099B2 (en) | 2009-06-09 |
JP2006179489A (en) | 2006-07-06 |
EP1675157A2 (en) | 2006-06-28 |
CN1828821B (en) | 2011-04-27 |
ATE459093T1 (en) | 2010-03-15 |
US20060220560A1 (en) | 2006-10-05 |
CN1828821A (en) | 2006-09-06 |
EP1675157A3 (en) | 2007-06-06 |
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